Construction of electric machines



(No Model.) 2 SheetsSheet 1.

P. DIEHL.

CONSTRUCTION 0E ELECTRIC MACHINES. No. 299,117. Patented Ma 1884.

MW 0MM AMM N, PETERS. Pmw-umgnphef, washinm", D. c.

(No Model.) 2 Sheets-Sheet 2.

P. DIEHL.

CONSTRUCTION 0E ELECTRIC MACHINES. No. 299,117. Pented May 27, 1884:.

UNITED STATES .PATENT OFFICE..

PHILIP DIEIII., oE ELIZABETH, NEW JERSEY.

CONSTRUCTION OF ELECTRIC MACHlNES.

SPECIFICATION forming part of Letters Patent No. 299,117, dated May 27, 1884. Application Elea April 5, leas. (No model.)

To aZZ whom it may concern:

Be it known that I, PHILIP DIEHL, of the city of Elizabeth, in the county of Union and State of New Jersey, have made a certain new and useful Improvement in the Construction of Electric Machines; and I do hereby declare that the following is a full, clear, and exact description and specification thereof.

My invention relates especially to that class of electric machines to which power is transmitted by lneans of a belt; and its Objectis to provide a simple and effective means for adj ustlnent in connection with such transmis-- sion. In machines of this character the results are so largely aected by any variation in the tension Vof this driving-belt that a'simple, certain, and easylnethod of adjusting and controlling such tension is necessarily a great advantage. I y

rIo illustrate the operatioll of my invention, I have sllown in the accompanying drawings an application of it to an ordinary dynamoelectric generator, alld in said drawings Figure 1 represents a side and Fig. 2 a top view of such dynamo.

I propose to construct the machine so that it shall be adapted to supports, (preferably pivotah) to provide it with such supports and with means of adj ustnient, so that the nlachine, with its belt-wheel, shall be raised from or lowered onto the driving-belt, and the pressure on such belt either entirely removed or increased to nearly the full weight of the lnachine, or adj usted. at will within these limits. A practical and convenient method of doing this is shown in the drawings, where one end of the machine is supported by and turns I freely on the fixed pivot a, which rests on the fixed standards A A, and the other end by the movable pivot Z1, through the center of which passes the adjusting-screw B, secured at its base in a suitable socket. The drivingbelt d, running ill the direction of the arrows,

and driven, as usual, from a pulley on a fixed shaft, passes around the central belt-wheel, D. As the adjusting-screw B is turned in either direction by its lland-wheel, the movable pivot b rises or falls, carrying with it one end of the g machine, (the other end turning on the iixed pivot m) and consequently causing the beltwheel D to correspondingly press upon or relieve the belt. Both of these supports may be made adjustable, if desired. Another great advantage of this arrangement of pivotal supports is, that in case it is desirable to use very little horizontal space the dynamo may be swung up into a vertical position and the adjusting device secured to a vertical support, similar to that shown by the dotted lines in Fig. l. Vith such all arrangement of the dynamo, it will be understood that the machine will be hinged to the support or bracket, which is indicated by the dotted lines, and that the adjusting device will be secured to a similar support or bracket arranged overhead, thus allowillg the adjustable upper end of the machine to be moved in an arc of a circle.

I claim as llly invention- 1. An electric machine having a drivingpulley, in combination with pivotal supports for said machine, and with nleans for adjusting the height of one of said supports, and thus varying the tension of the driving-belt for said pulley, substantially as described.

2. An electric machine llavillg a driving- 75 pulley, and constructed with aiixed pivotal support at one end and an adjustable support at the other, conlbined with means for changing the height of said adjustable support, and thus varying the tensioll of the driving-belt for the 80 said pulley, substantially as described.

PHILIP DIEHL.

Vitnesses:

GUsTAvE LEvY, J AMEs REID. 

